Galvanic Applied Sciences 943-TGX, Operation Manual

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Revision 4 13 August 02, 2019
1.2 Analytical Method
The analyzer uses a spectrometer with a diffraction grating that is optimized in the spectral
region where the species of interest absorb (the compounds of interest absorb between 200
and 400 nm) coupled to a detection system that maximizes sensitivity and resolution while
minimizing dark current and stray light noise (a 2048 element CCD detector is employed).
The UV radiation is supplied by a highly stable deuterium broadband source and is
transmitted to/from the measurement cell via UV fibre optic cables. This approach provides
for analytical accuracy and allows for more precise multi-species analysis than that of a
conventional photometer which uses narrow band optical filters. The conventional photometer
measures only a few discrete wavelengths and spectrometers having lower resolution and
fewer elements in the detector are also less precise.
If, as is frequently the case, more than one of the sulfur containing compounds indicated
above are present, their spectra will overlap. The system uses a deconvolution protocol to
separate the signals for each component via a multi component algorithm.
1.3 Analyzer Design
The Model 943-TGX Analyzer System is packaged in two (2) frame mounted cabinets:
a) An oven cabinet which contains the sample handling system and associated hardware
(i.e., solenoids, oven, heaters, etc.). All electrical equipment residing in the oven cabinet
is installed using appropriate explosion proof and/or intrinsically safe wiring methods.
b) A control cabinet which contains the electrical hardware necessary for the operation of
the analyzer. Under normal operating circumstances, the interior of the control cabinet
maintains a general purpose area classification through a purge system. Both visual and
electrical (contact closure) indications are provided for monitoring the status of the control
cabinet purge.